Add the following expressions:3n^(2)+5mn-6m^(2), 2m^(2)-3mn -4n^(2), 2 – InterviewSolution

1.	Add the following expressions:3n^(2)+5mn-6m^(2), 2m^(2)-3mn -4n^(2), 2mn-3m^(2)-7n^(2)
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